// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <stdint.h>

#include "media/formats/webm/webm_webvtt_parser.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"

using ::testing::InSequence;

namespace media {

typedef std::vector<uint8_t> Cue;

static Cue EncodeCue(const std::string& id,
    const std::string& settings,
    const std::string& content)
{
    const std::string result = id + '\n' + settings + '\n' + content;
    const uint8_t* const buf = reinterpret_cast<const uint8_t*>(result.data());
    return Cue(buf, buf + result.length());
}

static void DecodeCue(const Cue& cue,
    std::string* id,
    std::string* settings,
    std::string* content)
{
    WebMWebVTTParser::Parse(&cue[0], static_cast<int>(cue.size()),
        id, settings, content);
}

class WebMWebVTTParserTest : public testing::Test {
public:
    WebMWebVTTParserTest() { }
};

TEST_F(WebMWebVTTParserTest, Blank)
{
    InSequence s;

    const Cue cue = EncodeCue("", "", "Subtitle");
    std::string id, settings, content;

    DecodeCue(cue, &id, &settings, &content);
    EXPECT_EQ(id, "");
    EXPECT_EQ(settings, "");
    EXPECT_EQ(content, "Subtitle");
}

TEST_F(WebMWebVTTParserTest, Id)
{
    InSequence s;

    for (int i = 1; i <= 9; ++i) {
        const std::string idsrc(1, '0' + i);
        const Cue cue = EncodeCue(idsrc, "", "Subtitle");
        std::string id, settings, content;

        DecodeCue(cue, &id, &settings, &content);
        EXPECT_EQ(id, idsrc);
        EXPECT_EQ(settings, "");
        EXPECT_EQ(content, "Subtitle");
    }
}

TEST_F(WebMWebVTTParserTest, Settings)
{
    InSequence s;

    enum { kSettingsCount = 4 };
    const char* const settings_str[kSettingsCount] = {
        "vertical:lr",
        "line:50%",
        "position:42%",
        "vertical:rl line:42% position:100%"
    };

    for (int i = 0; i < kSettingsCount; ++i) {
        const Cue cue = EncodeCue("", settings_str[i], "Subtitle");
        std::string id, settings, content;

        DecodeCue(cue, &id, &settings, &content);
        EXPECT_EQ(id, "");
        EXPECT_EQ(settings, settings_str[i]);
        EXPECT_EQ(content, "Subtitle");
    }
}

TEST_F(WebMWebVTTParserTest, Content)
{
    InSequence s;

    enum { kContentCount = 4 };
    const char* const content_str[kContentCount] = {
        "Subtitle",
        "Another Subtitle",
        "Yet Another Subtitle",
        "Another Subtitle\nSplit Across Two Lines"
    };

    for (int i = 0; i < kContentCount; ++i) {
        const Cue cue = EncodeCue("", "", content_str[i]);
        std::string id, settings, content;

        DecodeCue(cue, &id, &settings, &content);
        EXPECT_EQ(id, "");
        EXPECT_EQ(settings, "");
        EXPECT_EQ(content, content_str[i]);
    }
}

} // namespace media
